ON Semiconductor Is Now To learn more about onsemi, please visit our website at www.onsemi.com onsemi andand other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba onsemi or its affiliates and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of onsemi product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. onsemi reserves the right to make changes at any time to any products or information herein, without notice. The information herein is provided as-is and onsemi makes no warranty, representation or guarantee regarding the accuracy of the information, product features, availability, functionality, or suitability of its products for any particular purpose, nor does onsemi assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using onsemi products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by onsemi. Typical parameters which may be provided in onsemi data sheets and/ or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including Typicals must be validated for each customer application by customers technical experts. onsemi does not convey any license under any of its intellectual property rights nor the rights of others. onsemi products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use onsemi products for any such unintended or unauthorized application, Buyer shall indemnify and holdo nsemi and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that onsemi was negligent regarding the design or manufacture of the part. onsemi is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. Other names and brands may be claimed as the property of others. 1 2 3 4 5 6 7 8 9 10 Buck Converter - High Current, Synchronous NCP3231A The NCP3231A is a high current, high efficiency, voltagemode synchronous buck converter which operates from 4.5 V to 18 V input and generates output voltages down to 0.6 V at up to 25 A. www.onsemi.com Features Wide Input Voltage Range from 4.5 V to 18 V MARKING 0.6 V Internal Reference Voltage DIAGRAM 500 kHz Switching Frequency 1 External Programmable Softstart 1 40 NCP3231A Lossless Lowside FET Current Sensing AWLYYWWG QFN40 6x6, 0.5P Output Overvoltage Protection and Undervoltage Protection CASE 485FJ System Overtemperature Protection using a Thermistor or Sensor NCP3231A = Specific Device Code Hiccup Mode Operation for All Faults A = Assembly Location Prebias Startup WL = Wafer Lot YY = Year Adjustable Output Voltage WW = Work Week Power Good Output G = PbFree Package Internal Overtemperature Protection This is a PbFree Device* PIN CONNECTIONS Typical Applications Cellular Base Stations ASIC, FPGA, DSP and CPU Core and I/O Supplies VIN EN 11 40 Telecom and Network Equipment VIN VCC 12 39 VIN GND Server and Storage System EP42 EP41 VIN 13 38 VB VIN 14 37 PGND VSWH 15 36 BST PGND 16 35 VSW PGND 17 34 VSWH VSWH EP43 PGND 18 33 VSWH PGND 19 32 VSWH 20 31 PGND VSWH (TOP VIEW) ORDERING INFORMATION Device Package Shipping NCP3231AMNTXG QFN40 2500 / (PbFree) Tape & Reel For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. *For additional information on our PbFree strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: December, 2019 Rev. 8 NCP3231A/D PGND VIN 21 PGND VIN 22 VIN PGND 23 PGND PG 24 PGND 25 OTS AGND PGND 26 PGND 27 ISET PGND 28 COMP 29 FB VSWH 30 VSWH SS